Gears and transmission
Assembled 2WD Sumo Robot
- Bounding box
- 392.5 × 312.5 × 92.0 mm
- Engine
- Precision B-rep
- Parameters
- 60
- Published
- August 22, 2026
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The prompt
Design a compact, aggressive 2-wheel-drive competition SUMO ROBOT. Main chassis: 260×200×6 mm plywood. 2 STD D-shaft gear motors. 2 wheels: Ø50×20 mm. Controller board: 100×60 mm. Battery holder: 76×61 mm. 5 ultrasonic sensors and 3 HW-870 IR sensors. Create a low-profile, wedge-front body with angled side armor, protected wheels, low center of gravity, and a professional competition appearance. Make the front wedge a separate removable part. Keep the design manufacturable from flat plywood using screws and simple cuts. Do not invent unknown motor or sensor mounting dimensions; leave those interfaces adjustable. Generate the 3D CAD model with a realistic mechanical layout, not a simple rectangular box.
Parameters
| Name | Value | Range |
|---|---|---|
| Chassis length | 260 mm | 200 – 320 |
| Chassis width | 200 mm | 150 – 250 |
| Chassis thickness | 6 mm | 3 – 12 |
| Wheel slot X position | -75 mm | -130 – 130 |
| Wheel slot Y offset | 70 mm | 50 – 90 |
| Wheel slot length | 70 mm | 40 – 100 |
| Wheel slot width | 35 mm | 20 – 60 |
| Cable slot X position | 120 mm | 0 – 130 |
| Cable slot Y position | 0 mm | -90 – 90 |
| Cable slot length | 30 mm | 10 – 50 |
| Cable slot width | 8 mm | 4 – 16 |
| Lightening hole diameter | 25 mm | 10 – 40 |
| Front wedge width | 200 mm | 160 – 220 |
| Front wedge length | 80 mm | 60 – 120 |
| Front wedge height | 18 mm | 12 – 24 |
| Side armor length | 260 mm | 200 – 300 |
| Side armor height | 60 mm | 40 – 80 |
| Side armor thickness | 6 mm | 3 – 10 |
| Side armor outward angle | 12 deg | 0 – 30 |
| Wheel arch clearance diameter | 60 mm | 50 – 75 |
| Rear bumper length | 200 mm | 160 – 230 |
| Rear bumper depth | 40 mm | 20 – 60 |
| Rear bumper height | 12 mm | 8 – 20 |
| Motor body length | 70 mm | 50 – 90 |
| Motor body width | 37 mm | 25 – 50 |
| Motor body height | 37 mm | 25 – 50 |
| Motor X position | -75 mm | -130 – 130 |
| Motor Y offset | 70 mm | 50 – 90 |
| Motor Z center | -24.5 mm | -50 – 0 |
| Drive wheel diameter | 50 mm | 40 – 65 |
| Drive wheel width | 20 mm | 12 – 30 |
| Wheel X center | -75 mm | -130 – 130 |
| Wheel Y center | 85 mm | 60 – 95 |
| Wheel Z center | -24.5 mm | -50 – 0 |
| Wheel bore diameter | 6 mm | 4 – 10 |
| Controller PCB length | 100 mm | 80 – 120 |
| Controller PCB width | 60 mm | 40 – 80 |
| Controller PCB thickness | 1.6 mm | 1 – 3 |
| Controller PCB X center | -50 mm | -120 – 0 |
| Controller PCB bottom Z | 35 mm | 20 – 50 |
| Battery holder length | 76 mm | 60 – 90 |
| Battery holder width | 61 mm | 50 – 75 |
| Battery holder height | 20 mm | 12 – 30 |
| Battery holder X center | -50 mm | -120 – 0 |
| Standoff diameter | 5 mm | 3 – 8 |
| Standoff height | 15 mm | 8 – 25 |
| Standoff X offset | 40 mm | 25 – 50 |
| Standoff Y offset | 25 mm | 15 – 35 |
| Ultrasonic sensor length | 45 mm | 35 – 60 |
| Ultrasonic sensor width | 20 mm | 15 – 30 |
| Ultrasonic sensor height | 15 mm | 10 – 20 |
| Ultrasonic mid X position | 170 mm | 135 – 210 |
| Ultrasonic middle Y spacing | 60 mm | 40 – 90 |
| Ultrasonic corner X position | 200 mm | 160 – 210 |
| Ultrasonic corner Y position | 90 mm | 60 – 100 |
| IR sensor length | 35 mm | 25 – 45 |
| IR sensor width | 15 mm | 10 – 20 |
| IR sensor height | 15 mm | 10 – 20 |
| IR sensor X position | 190 mm | 160 – 210 |
| IR sensor Y spacing | 40 mm | 25 – 60 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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